Time-wavelength optical sampling spectroscopy based on dynamic laser cavity tuning

被引:5
|
作者
Soundararajan, Srikamal J. [1 ]
Yang, Lin [1 ]
Zhang, Shuqin [1 ,2 ]
Jani, Hemang [1 ]
Duan, Lingze [1 ]
机构
[1] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA
[2] China Jiliang Univ, Inst Opt & Elect Technol, Hangzhou, Zhejiang, Peoples R China
基金
美国国家科学基金会;
关键词
DUAL-COMB SPECTROSCOPY; FOURIER TRANSFORMATION; FEMTOSECOND LASER; FREQUENCY; BANDWIDTH;
D O I
10.1364/JOSAB.35.001186
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Time-wavelength optical sampling (TWOS) is proposed here as a scheme that leverages the advantages of both wavelength-time mapping and ultrafast optical sampling to achieve real-time spectral measurement with simple configurations and slow photodetectors. As a proof of concept, a TWOS spectrometer based on dynamic optical sampling by laser cavity tuning is developed. Real-time absorption spectroscopy with a 0.3-nm spectral resolution and a 60-nm total spectral range (laser limited) is demonstrated at a 150-Hz updating rate. Theoretical analysis and practical limiting factors are discussed in detail. Potential applications of TWOS include spectroscopy, imaging, metrology, and optical sensing. (C) 2018 Optical Society of America.
引用
收藏
页码:1186 / 1191
页数:6
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